Consider the following statements: Statement-I: The soil in tropical rain forests is rich in nutrients. Statement-II: The high temperature and moisture of tropical rain forests cause dead organic matter in the soil to decompose quickly. Which one of the following is correct in respect of the above statements?

Statement-I: Incorrect. Tropical rain forest soils are generally heavily leached and nutrient-poor; most nutrients are stored in the biomass/vegetation, not in the soil.
Statement-II: Correct. High temperature and high moisture cause rapid decomposition of organic matter, so nutrients are quickly recycled and taken up by plants.
Answer: Since Statement-I is false but Statement-II is true, the correct option is (d).